libstr-c

commit aeee626d4d6a7b3cbb4d5ae4b1698331d2da8227
Author: Louis Burda <quent.burda@gmail.com>
Date:   Sun, 30 Apr 2023 23:25:26 +0200

Add basic string allocation api

Diffstat:
A
.gitignore
 | 
3
+++
A
.gitmodules
 | 
3
+++
A
Makefile
 | 
38
++++++++++++++++++++++++++++++++++++++
A
include/str.h
 | 
9
+++++++++
A
lib/liballoc
 | 
1
+
A
libstr.api
 | 
3
+++
A
libstr.lds
 | 
7
+++++++
A
src/str.c
 | 
60
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

8 files changed, 124 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,3 @@
+.cache
+build
+compile_commands.json
diff --git a/.gitmodules b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "lib/liballoc"]
+	path = lib/liballoc
+	url = git@sinitax.com:snx/liballoc
diff --git a/Makefile b/Makefile
@@ -0,0 +1,38 @@
+PREFIX ?= /usr/local
+LIBDIR ?= /lib
+INCLDIR ?= /include
+
+CFLAGS = -Wconversion -Wunused-function -Wunused-variable
+CFLAGS += -I lib/liballoc/include -I include
+
+all: build/libstr.a build/libstr.so
+
+clean:
+	rm -rf build
+
+build:
+	mkdir build
+
+lib/liballoc/build/liballoc.a:
+	make -C lib/liballoc build/liballoc.a
+
+build/libstr.a: src/str.c include/str.h libstr.api lib/liballoc/build/liballoc.a | build
+	$(CC) -o build/tmp.o src/str.c $(CFLAGS) -r
+	objcopy --keep-global-symbols=libstr.api build/tmp.o build/fixed.o
+	ar rcs $@ build/fixed.o
+
+build/libstr.so: src/str.c include/str.h libstr.lds | build
+	$(CC) -o $@ src/str.c $(CFLAGS) \
+		-shared -Wl,-version-script libstr.lds
+
+install:
+	install -m755 build/libstr.a -t "$(DESTDIR)$(PREFIX)$(LIBDIR)"
+	install -m755 build/libstr.so -t "$(DESTDIR)$(PREFIX)$(LIBDIR)"
+	install -m644 include/str.h -t "$(DESTDIR)$(PREFIX)$(INCLDIR)"
+
+uninstall:
+	rm -f "$(DESTDIR)$(PREFIX)$(LIBDIR)/libstr.a"
+	rm -f "$(DESTDIR)$(PREFIX)$(LIBDIR)/libstr.so"
+	rm -f "$(DESTDIR)$(PREFIX)$(INCLDIR)/str.h"
+
+.PHONY: all clean install uninstall
diff --git a/include/str.h b/include/str.h
@@ -0,0 +1,9 @@
+#pragma once
+
+#include "allocator.h"
+
+#include <stdarg.h>
+
+int str_fmt(struct allocator *allocator, char **out, const char *fmstr, ...);
+int str_dup(struct allocator *allocator, char **out, const char *str);
+int str_app(struct allocator *allocator, char **out, const char *app);
diff --git a/lib/liballoc b/lib/liballoc
@@ -0,0 +1 @@
+Subproject commit 5b667362498ed4cdc6ad5a9036834c6ab1bed4e9
diff --git a/libstr.api b/libstr.api
@@ -0,0 +1,3 @@
+str_fmt
+str_dup
+str_app
diff --git a/libstr.lds b/libstr.lds
@@ -0,0 +1,7 @@
+LIBSTR_1.0 {
+	global:
+		str_fmt;
+		str_dup;
+		str_app;
+	local: *;
+};
diff --git a/src/str.c b/src/str.c
@@ -0,0 +1,60 @@
+#include "str.h"
+
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+str_fmt(struct allocator *allocator, char **out, const char *fmtstr, ...)
+{
+	va_list ap, cpy;
+	ssize_t n;
+	int rc;
+
+	va_copy(cpy, ap);
+
+	va_start(cpy, fmtstr);
+	n = vsnprintf(NULL, 0, fmtstr, cpy);
+	va_end(cpy);
+	if (n <= 0) return 1;
+
+	rc = allocator->alloc((void **) out, (size_t) (n + 1));
+	if (rc) return -rc;
+
+	va_start(ap, fmtstr);
+	vsnprintf(*out, (size_t) (n + 1), fmtstr, ap);
+	va_end(ap);
+
+	return 0;
+}
+
+int
+str_dup(struct allocator *allocator, char **out, const char *str)
+{
+	int rc;
+
+	rc = allocator->alloc((void **) out, strlen(str) + 1);
+	if (rc) return -1;
+
+	strcpy(*out, str);
+
+	return 0;
+}
+
+int
+str_app(struct allocator *allocator, char **str, const char *app)
+{
+	size_t slen, alen;
+	int rc;
+
+	alen = strlen(app);
+	slen = *str ? strlen(*str) : 0;
+
+	rc = allocator->realloc((void **) str, slen + alen + 1);
+	if (rc) return -rc;
+
+	memcpy(*str + slen, app, alen + 1);
+
+	return 0;
+}